| Name | Affiliation | Occupation / Position Title | City | Country | State | |
|---|
| Marshall, David | Kaiser Permanente | LMFT LMHC | Beaverton | United States | Oregon | View |
| Marshall, Sally | KBT Skeppsbron | authorized psychotherapist CBT | Gothenburg | Sweden | Västra Götalands län | View |
| Marshall, Sarah | Australian Psychological Society (APS) | BSc (Hon), PhD. Psychologist in private practice | Sydney | Australia | New South Wales | View |
| Marshall, Stephen | Cambridge Psychology Group/McLean Hospital/Harvard Medical School | Clinical Psychologist | Arlington | United States | Massachusetts | View |
| Marsland, Soph | Australian Psychological Society | Psychologist | Melbourne | Australia | Victoria | View |
| Martin, Aiveen | GHR (Reg), Mental Health Europe (MHE). | Mental Health and Wellbeing Consutlant Trainer | Rapid City | United States | South Dakota | View |
| Martin, Angelica | Private Practitioner | Licensed Professional Counselor | New Orleans | United States | Louisiana | View |
| Martin, Caroline | Martin Counselling & Consulting | Therapist & Educator | Halifax | Canada | Nova Scotia | View |
| Martin, Fiona | takeACTion.me.uk | Counsellor/ Coach | Holywell | United Kingdom | Flintshire | View |
| Martin, Maeve | Adirondack Samaritan Counseling Center, Private Practice | Psychotherapist | Glens Falls | United States | New York | View |
| Martin, Ned | Spring Counseling PLLC | Licensed Professional Counselor | Lake Junaluska | United States | North Carolina | View |
| Martin, Staci | National Cancer Institute | Psychologist/Senior Associate Scientist | Bethesda | United States | Maryland | View |
| Martínez-Líbano, Jonathan | Universidad Andrés Bello | Psicología | Valparaíso | Chile | | View |
| Martinez, Jacob | Private Practice | Licensed Professional Counselor | Milwaukee | United States | Wisconsin | View |
| MARTINEZ, JOSE | LIBER TCC | SANCHEZ | CDMX | Mexico | Distrito Federal | View |
| Martinez, Laura | Miembro | Lic en psicología | Caba | Argentina | Capital federal | View |
| Martinez, Robin | RadEd Collective | BCBA | Oakland | United States | California | View |
| Martins, João | Modus Psicologia | Psychologist | João Pessoa | Brazil | Paraiba | View |
| Martins, Maria João | Universidade de Coimbra | Psychologist | Coimbra | Portugal | Coimbra | View |
| Marzec, Mitchell | ACT Now Counseling | Licensed Professional Clinical Mental Health Counselor (LPCC) | Albuquerque | United States | New Mexico | View |
| Marzik, Estefania | psicologa | Psicologa | Buenos Aires | Argentina | Capital federal | View |
| Mascaro, Nathan | Atlanta CBT | Psychologist | Stone Mountain | United States | Georgia | View |
| Mashal, ABPP, Nehjla | Al-Ahliyya Amman University (AAU) | Clinical Psychologist | Amman | Jordan | Amman | View |
| Mason, Annette | Dept. of Veterans Affairs | LICSW | Saint Cloud | United States | Minnesota | View |
| Masterpasqua, Frank | Inst for Graduate Clinical Psychology, Widener University | Professor | Swarthmore | United States | Pennsylvania | View |
| Masterson Tilford, Stacy | Hamilton County Educational Service Center | Behavior Analyst | Cincinnati | United States | Ohio | View |
| Masuda, Akihiko | University of Hawaii at Manoa | Professor, Psychology Department (Clinical) | Honolulu | United States | Hawaii | View |
| Mata, Sofía | Private Practice | Psicoterapeuta | El Marqués | Mexico | Queretaro | View |
| Matacz- Szymanowicz, Iwona | NZOZ Diada NFZ Pyskowice, ODT Pozytywka | psychoterapeuta | Zabrze | Poland | śląskie | View |
| MATEO, SILVIA | CENTRO DE PSICOLOGIA PSIQUE | directora | SORIA | Spain | Soria | View |
| Mather, Doug | The Creation Company (2020) Ltd | Specialist in Human Behaviour | London | United Kingdom | London | View |
| Matheus, Daniela | CRP 08/12002 | Clinical Psychologist | Curitiba | Brazil | Parana | View |
| Matsen Devitt, Julie | Springfield Behavioral of PA | Psychologist | Hazlet | United States | New Jersey | View |
| Matthews, Megan | Untangled Counseling Services, LLC | Founder/Clinical Director | Lakewood | United States | Ohio | View |
| Matthijssen, Denise | Pivate practice | familytherapist and coach | Ingen | Netherlands | | View |
| Mattoli, Scarlett | Psynamo Limited | Director/Clinical Psychologist | Central | Hong Kong | Central and Western | View |
| Mattos, Alexandre | Private office | Psychotherapist | São Paulo | Brazil | Sao Paulo | View |
| Mawson, Emily | Barwon Health | Clinical Psychologist | Geelong | Australia | | View |
| Maxey, C. David | Portland Psychological Services | Licensed Independent Psychologist Associate | Portland | United States | Oregon | View |
| May, Michael | Mandala House, LLC | Psychotherapist; Director of Supervision & Training | LOUISVILLE | United States | Kentucky | View |
| May, Robin | Australian Psychological Society, Australian Association of Smoking Cessation Specialists, Australian Association of Cognitive & | Psychologist | St Leonards | Australia | New South Wales | View |
| Mayado, Verónica | Instituto del comportamiento | Director | Salamanca | Spain | Salamanca | View |
| Mayberry, Emily | Sheffield Teaching Hospitals NHS Foundation Trust / University of Sheffield | Clinical Psychologist | Sheffield | United Kingdom | | View |
| Maynard, Patricia | Tapestry Wellness Counseling Practice | Therapist/Owner | MEMPHIS | United States | United States Minor Outlying Islands | View |
| Mazurczak, Agnieszka | pomocnia | Ma in psychology | poznan | Poland | wielkopolskie | View |
| Mazza, Marisa | choicetherapy | Psychologist | Berkeley | United States | California | View |
| Mazzei, Rae | Evolutions Behavioral Health Services | Health Psychologist | Chandler | United States | Arizona | View |
| Mazzeo, Gabriela | Equipo Fons | Psicoterapeuta | Bahía Blanca | Argentina | Buenos Aires | View |
| McAleese, Jacqueline | J. Page Forward, LLC | LCSW | Alpharetta | United States | Georgia | View |
| McAlpine, Lindi | British Psychological Society | Mindfulness-based Cognitive Therapist | Truro | United Kingdom | Cornwall | View |
